/**
 *       Copyright (c) 2012 Lukas Zaruba
 *
 *   This file is part of Robot Playground.
 *
 *   Robot Playground is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   Robot Playground is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with Robot Playground. If not, see <http://www.gnu.org/licenses/>.
 */
package net.zarubsys.commons.scripting.functions.strings;

import java.util.Iterator;
import java.util.List;

import net.zarubsys.commons.scripting.IScriptFunction;
import net.zarubsys.commons.scripting.ParsedStatement;
import net.zarubsys.commons.scripting.ScriptingEnvironment;
import net.zarubsys.commons.scripting.ScriptingException;

/**
 * Based on scripting language from Media Solutions Slovakia, a.s.
 * @author Lukas Zaruba, lukas.zaruba@gmail.com
 */
public class ContainsFunction implements IScriptFunction {

	@Override
	public int getMaxArgsNum() {
		return -1;
	}

	@Override
	public int getMinArgsNum() {
		return 2;
	}

	@Override
	public String getName() {
		return "contains";
	}

	@Override
	public Object execute(ScriptingEnvironment env, List<ParsedStatement> args)	throws ScriptingException {
		Iterator<ParsedStatement> iter = args.iterator();
		Object o1 = iter.next().execute(env);
		Object o2 = null;
		if (!(o1 instanceof String)) {
			throw new IllegalArgumentException("All parameters of the '" + getName() + "' function has to return String!");
		}
		String s1 = (String) o1;
		String s2 = null;
		do {
			o2 = iter.next().execute(env);
			if (!(o2 instanceof String)) {
				throw new IllegalArgumentException("All parameters of the '" + getName() + "' function has to return String!");
			}
			s2 = (String) o2;
			if (s1.contains(s2)) return true;			
		} while (iter.hasNext());
		return false;
	}

}
